FreeImage is a library project for developers who would like to support popular graphics image formats (PNG, JPEG, TIFF, BMP and others). Some highlights are: extremely simple in use, not limited to the local PC (unique FreeImageIO) and Plugin driven!

Importer library to import assets from different common 3D file formats such as Collada, Blend, Obj, X, 3DS, LWO, MD5, MD2, MD3, MDL, MS3D and a lot of other formats. The data is stored in an own in-memory data-format, which can be easily processed.
www.open3mod.com/ is a 3D model viewer and exporter based on Assimp that is also Open Source.

JPype is an effort to allow python programs full access to java class libraries. This is achieved not through re-implementing Python, as Jython/JPython has done, but rather through interfacing at the native level in both Virtual Machines.

Source Navigator NG is a source code analysis tool.
With it, you can edit your source code, display relationships between classes and functions and members, and display call trees.
You can navigate your source code and easily get to declarations or implementations of functions, variables and macros (commonly called "symbols") which helps you discovering and mapping unknown source code for enhancement or maintenance tasks.

OxygenOffice Professional(OOOP, O2OP)is an enhanced version of free OpenOffice.org what is a multi-platform office productivity suite.OxygenOffice Professional contains more extras like templates, cliparts, samples, fonts and VBA support. Get 3.2.1

SMC takes a state machine stored in a .sm file and generates a State pattern in 14 programming languages. Includes: default transitions, transition args, transition guards, push/pop transitions and Entry/Exit actions. See User Manual for more info.

TANGO is a device oriented control system for Linux and Windows. It provides a framework in C++, Java and Python for implementing distributed control objects. TANGO has a full set of tools and hundreds of device servers.

WideStudio is an Integrated Development Environment (IDE) for building window applications in C++, Ruby, Python an Perl for Windows, MacOSX, Linux, FreeBSD, SOLARIS and other unix and BTRON and T-Engine. This is open and free (under MIT/X Consortiun Lice

Audiere is a portable audio library which supports playing MP3, Ogg Vorbis, FLAC, WAV, IT, XM, S3M, and MOD files. You can use it from C, C++, Python, Java, Delphi, and any language that supports XPCOM (JavaScript in Mozilla, for example).

SQL DAL Maker is a generator of DTO and DAO classes. Target programming languages: PHP, Java, C++, Python.
To generate the class, you declare it in XML meta-program.
Implemented as plug-in for Eclipse-platform and plug-in for IntelliJ-platform.